Four-roll hammer



March 31, 1931. w. w. cRlLEx 1,793,309

FOUR-ROLL HAMMER Filed July 16, 1928 4 Smets-Sheet l A TTORNEYS Marchl31, 1931. w. w. cRlLEY FOUR-ROLL HAMMER Filed July 16, 1928 4SheetsSheet 2 I N V EN TOR.

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W. W. CRILEY FOUR-ROLL HAMMER 4 sheets-sheet 4 Filed July 16, 192B T-ATTORNEYJ Patented Mar. 31, 1931 UNITED 'STATES `PATENT OFFICE WLLIAM W.ORILEY, OF CLEVELAND, OHIO, ASSIGNOR TO THE AJAX MANUFACTUR- ING-GOMPANY, OF EUGLID, OHIO, A CORPORATION F OHIO FOUR-ROLL HAMMERApplication filed July 16, 1928.

The present invention relates, as indicated, to a four-roll hammer, andthe primary object thereof is to provide a more efficient machine of thetype indicated.

A further obj ect of the invention is to provide an especially efficientdrive for a hammer of the type indicated.

A further object is to provide means for compensating for variations inthe Wear on f the board of a machine of the type indicated.

A still further object is to provide means in a device of the classindicated for varying the stroke of the ram.

To the accomplishment of the foregoing and related ends, said invention,then, consists of the means hereinafter fully described and particularlypointed out in the claims.

The annexed drawing and the following description set forth in detailcertain mechanism embodying the invention, such disclosed meansconstituting, however, but one of various mechanical forms in which theprinciple of the invention may be used.

In said annexed drawings:

Fig. 1 is a front elevation of a hammer embodying my invention; Fig. 2is a side elevation of the same as viewed from the left of Fig. 1; Fig.3 is a side elevation of the same as viewed from the right of Fig. 1,certain elements being removed for clarity of illustration; Fig. 4 is aplan view thereof; Fig. 5 is an elevation of a detail; Fig. 6 is an endelevation of the detail disclosed in Fig. as

Vviewed from the left of said figure; Fig. 7 is an enlarged view, partlyin section, of a portion of an auxiliary trip mechanism; and Fig. 8 isan enlarged sectional view of a further detail.

Referring more particularly to the drawings, the reference numeral 10indicates a frame in `which is slidably mounted a ram 11 havingconnected thereto a. board 12 with which are adapted to co-operate twopairs of rolls 13 and 14 and 15 and 16 (see Fig. 2) A motor 17 ismounted upon said frame, and the spindle of said motor is connectedthrough flexible couplings 18 and a shaft 19 to a drive shaft 2()journalled in said frame and carrying a drive pinion 21 in mesh with adrive gear 22. A shaft 23 is journalled in said Serial No. 293,266.

frame in a horizontal plane below that of the shaft 20, and said shaft23 carries an intermediate gear 24 and a pinion 25. The roll 13 isprovided with a shaft 26, and the roll 14 carries a shaft 27, and rollgears 28 and 29 of equal pitch diameters are mounted on said shafts 26and 27 respectively, in mesh with said pinion' 25.` A second shaft 30 isjournalled iny said frame in the same horizontal plane with the shaft23and in the same vertical plane with the shaft 20, and said shaft 30carries said drive gear 22, an intermediate gear 31 of equal pitchdiameter with the intermediate gear 24 and meshing therewith, and apinion (not shown) similar to the pinion 25. The roll 15 is providedwith a shaft on which is mounted a roll gear 32, and the roll 16 carriesa similar shaft mounting a similar roll gear (not shown). It is to beunderstood that the gears carried by the shafts of the rolls 15 and 16are of a pitch diameter equal to that of the gears 28 and 29, and thatsaid gears mesh with the pinion carried by the shaft 30. A fly wheel 33is carried on the shaft 20.

The roll 13 is journalled in a housing 34 while the roll 14-isjournalled in a similar housing 35.. Housings 34 and 35 are formed witheccentric hubs 36 and 37 respectively,

and said hubs are ournalled in the hammer frame so that oscillation ofthe housings 34 and moves the rolls 13 and 14 respectively, toward andway from the board 12.

` The housing 34 is formed with a bifurcated radially extending arm 38to the furcations of which is pivoted the upper forked end of a link 39,a pin 40 passing through the furcations of thearm 38 and of the link 39.The housing 35 is formed with a similar bifurcated arm 41 to which arepivoted the lower end 42 of the link 39 and the upper end 43 of afriction rod 44 by means of a pin 45 passing through the furcations ofsaid arm and through suitable bores formedfin said ends 42 and 43.

At a suitable point as 46, there is pivoted to the frame 10 a bell cranklever, one arm 47 of which is received in a member 48 clamped to thefriction rod 44, and the other end 49 of which carries a roller 50adapted to cooper- Cil ate with a cam surface 51 formed upon the ram 11.At a lower point in the same vertical line, as 52, there is pivoted a`second bell crank lever, one arm 53 of which is received in a member 54clamped to the friction rod 44 and the other arm 55 of which is formedwith a socket 56. The outer wall of said socket 56 perforated to permitthe passage of shaft 58 carrying a roller 57, said roller being normallycarried entirely within the socket 56, and being` resilicntly held insuch position by a coiled spring 59 sleeved on said shaft and bearing atits one end against the rear wall of the socket 56 and at its oppositeend against the collar 60 rigidly mounted on the shaft 58. I providemeans for overcoming the force of the spring 59 and projecting theroller 57 into the path of the cam surface 51 on the ram 11, and in thisparticular instance I have illustrated a solenoid coil 61 for thatpurpose. It is to be understood, however, that any desired means may beprovided for this purpose, and that I do not intend to limit myself. tothe use of a solenoid or any other specific means for accomplishing thiseffect. Y

The rear rolls 15 and 16 are journalled in housings 62 and 63 formedwith eccentric hubs 64 and 65 respectively, said hubs being journalledin the frame so that oscillation of the housings causes movement of therolls 15 and 16 toward and away from the board 12. Referring to Figs. 5and 6, it will be seen that the housing 62 is formed adjacent one endwith a bifurcated radially projecting arm 66. A pin 67 passes throughthe furcations of said arm and through a suitable bore in the upper end68 of a connecting member 69, thus pivoting said member to said arm. Themember 69 is formed with a recess 70 in its lower end, and said recesssnugly receives the upper 71 of a link 72, said link being secured insaid recess by means of thread and a piu 7 3 passing` through saidmembers 69 and 72. The housing` 63 is formed adjacent the same end witha bifurcated radially projecting arm- 7 4 to which is pivoted by meansof a pair of pins 75, the lower end of a sleeve 76. The lower end ofsaid sleeve is vertically iored as 77 to permit the passage of the link72, and said link is formed with an upwardly facing external shoulder 78which normally registers with an upwardly facing internal shoulder 79formed on the sleeve 76. It washer or follower 80 is sleeved on saidlink above said shoulders and is so formed as to rest partially upon theshoulder 78 and partially upon the shoulder 79. rlhe upper end of thesleeve 76 is bored as at 81 to permit the passage of the lower end ofth-e connecting member 69, and it will be seen that said lower endconstitutes a shoulder 82 which normally registers with the lowersurface of the upper end of the sleeve 76. fr washer or follower 83 issleeved on said link and is so formed as to contact with the saidshoulder 82 and with said lower surface of the upper end of the sleeve76. A compression spring 84 is also sleeved on said link and bears atits one end against said follower 8O and at its other end against saidwasher 83.

The housing 63 is formed adjacent its oppoeud with a second bifurcatedarm 85 in the saine plane with the arm 74, and a pin 86 pivots to saidarm the upper end 87 of a link 88. The lower end 89 of the link 88 ispivoted to one end 90 of a compensating` or equalizing member 91; thelower end 92 of the link 72 is pivoted to the opposite end 93 of saidmember; and the upper end 94 of an adjusting` rod 95 is pivoted to saidmember at its mid-point. The lower end of said rod passes through a lug96 formed on or secured to the frame 10, and said lower end is threadedfor the reception of adjusting nuts 97 on opposite sides of the lug 96.

In Fi 2 I have illustrated a slight modification of the above describedarrangement omitting the resilient connection between the housings 62and 63 and substituting a hinged connection. Thus it will be seen that alink 98 has its upper end 99 pivoted to the arm 66 and its lower end 100pivoted to the end 93 of the member 91.

I prefer to mount the motor 17 resiliently upon the hammer frame in themanner disclosed in my copending application, Serial No. 293,267, filedJuly 16, 1928, said motor being` secured to a platform 101 hinged to theframe at 102 and having its outer edge resiliently supported by means ofrods 103 passing through ears 104 on the frame, a spring 105 beingsleeved upon each of said rods 103 between the platform 101 and the ear104, and a second spring 106 being sleeved on each of said rods 103between said ears 104 and a stop 107 ou the lower end of said rod.

The operation of the herein disclosed device is as follows: A suitableclamp (not shown) is provided for holding` the ram 11 in its elevatedposition. The motor 17 drives the shaft 2O which, through the pinion 21and gear 22, drives the shaft 30 upon which are mounted the intermediategear 31 and thc roll pinion (not shown). The gear 31, meshing with thegear 24 rotates the shaft to rotate the pinion 25, and said two pinionsrotate the four roll gears. Thus it will be seen that the rolls 13, 14,15 and 16 are constantly rotated.

Villien the ram is tripped by the operator, it falls and operatessuitable latch mechanism to permit the friction rod 44 to drop. is saidrod drops, it rotates the housings 34 and 35 in a clockwise direction asviewed in Fig. 2, and, due to the eccentricity of the hubs 36 and 37,the rolls 13 and 14 are moved into contact with the board 12. Frictionalcontact is thus established between the rolls 13 and 14 on one side, andthe rolls 15 and 16 on the other side,

and the board 12, and the rotating rolls cause the board 12 and theconnected ram 11 to be moved upwardly. lVith the parts in the positionillustrated in Fig. 1, the cam surface 51 will come into contact withthe roller 50 to rotate the bell crank pivoted at 46 in a clockwisedirection as viewed in Fig. 3 to elevate the friction rod 44 and thus tomove the rolls 13 and 14 out of contact with the board 12. This cyclewill be repeated until the operator permits the above mentioned clamp tooperate to hold the ram 11 in elevated position.

If the operator desires a shorter and quicker stroke of the ram, heenergizes the solenoid 61 (or operates such mechanism as may be suppliedfor reciprocating the shaft 58) to move the roller 57 out of the socket56 and into the path of the Cam surface 51. It will be obvious that,with the roller 57 in this projected position, the friction rod 44 willbe elevated to move the rolls 13 and 14 out of contact with the board 12at an earlier moment in the elevation of the ram, and thus will shortenthe stroke of the ram.

Referring to Fig. 2, it will be seen that the adjusting rod 95 acts asan abutment to prevent the pressure applied to the rolls 15 and 16 whenthe rolls 13 and 14 are moved into contact with the board 12 fromrotating the housings 62 .and 63 in a countercloclwise direction. Itwill also be seen that the reaction of the housing 62 is 'borne by theend 93 of the compensating member 91 while the reaction of the housing63 is borne by the end 90 of said member 91. Obviously, then, anyunevenness in the board 12 which causes, at a given moment, a greaterpressure on the roll 16 thanon the roll 15, will be permitted to movethe housing 63 slightly in a counterH clockwise direct-ion. However,such movement will cause the link 88 to depress the end 90 of the member91 about a iixed pivot formed by the upper end 94 of the adjusting rod95, and such movement will elevate the end 93 of said member 91 torotate the housing 62 by a corresponding amount in a clockwisedirection. Thus the pressure, at this given moment, of the roll 16against the board 12 and the pressure of the roll 15 against said boardare equalized. the pressure of the board against the roll 1F exceeds, atany time, the pressure of the board against the roll 16, the oppositeaction will take place and again the pressures will be almostinstantaneously equalized. It will be obvious that such an arrangementwill reduce the wear on the board and will further increase theefficiency of the rolls in their operation on the board.

Referring now to Figs. 5 and 6, it will be seen that the action of thearrangement therein disclosed is similar to that just described, but isimproved by the addition of the resilient connection between thehousings Clearly, ifv

62 and 63. Thus, if the pressure against the roll 16 exceeds thatagainst the roll 15, again the end 90 of the member 91 will be depressedand the end 93 thereof will be elevated.

Such elevation of the end 93 moves the link,

72 upward, and the shoulder 78 lifts the follower 8() from itsengagement with the shoulder 79, compressing the spring 84. The force ofthe spring 84 is thus added to the pressure of the rolls 15 and 16against the board, and furthermore, the spring 84 acts to return thehousings 62 and 63 to their normal positions as soon as the unevennesswhich has caused the movement of the housings has passed beyond therolls. clear that, if the pressure against the roll 15 exceeds thepressure against the roll 16, the link 72 will be moved downwardly, andin such an event, the end 82 of the member 69 will remove the follower83 from its contact with the sleeve 76 to compress the spring 84.

Other modes of applying the principle of my invention may be employedinstead of the one explained, change being made regards the mechanismherein disclosed, provided the meansstated by any of the followingclaims or the equivalent of such stated means be employed. Y

I therefore particularly point out and distinctly claim as my invention:

1. In a board hammer, a roll and a board, a friction rod for moving saidroll into contact with said board, a ram mounted to rew ciprocate in theframe of said hammer, a bell crank trip lever pivoted to said frame andhaving one arm engaged with said friction rod and its other arm disposedin the ascend.- ing path of said ram, and a second trip lever pivoted tosaid frame and having its onearm engaged with said friction rod, theother arm of said second lever having a portion movable relatively tosaid arm into and out of the ascending path of said ram.

2. In a board hammer, a. roll and a board,

a friction rod for moving said roll into con tact with said board, a rammounted to reciprocate in the frame of said hammer, a bell crank triplever pivoted to said frame and having one arm engaged with saidfriction rod and its other arm disposed in the ascending path of saidram, and a second bell cranl: trip lever pivoted to said frame andhaving its one arm engaged with said friction rod, the other arm of saidsecond lever having a portion movable relatively thereto and nor mallydisposed out of the path of said ram, said portion being movablethereinto at the will of the operator without affecting the position ofsaid first mentioned arm.

3. In a board hammer, a roll and a board, a friction rod for moving saidroll into contact with said board, a ram mounted to reciprocate in theframe of said hammer, a trip lever pivoted to said frame and having onearm engaged with said friction rod and its It will beY other armdisposed in the ascending path 0f said ram, and a second two armed triplever pivoted to said frame and having its one arm engaged with saidfriction rod, the other arm of said lever being disposed out of the pathof said ram, and means carried by said other arm and movable relativelythereto and proje-ctible into the ascending pat-h of said ram.

4i. ln a board hammer, a roll and a board, a friction rod for movingsaifl roll into contact with said board, a ram mounted to reciproateinthe frame of said hammer, a trip lever pivoted to said frame andhaving one arm enga ged with said friction rod and its other arm f disnosed in the ascendinvr oath of said ram ze l a a second trip leverpivoted to said frame and having its one arm engaged with said frictionrod, a shaft carried by the other arm of said second lever, said shaftbeing disposed parallel to the pivotal axis of said lever, and means forshifting said shaft transversely of said leve-r arm into and out of theascending pat-h of said ram.

5. ln a board hammer, a roll and a board, a friction rod for moving saidroll into contact with said board, a ram mounted to reciprocate in theframe of said hammer, a trip lever pivoted to said frame and having onearm engaged with said friction rod and its other arm disposed in theascending path of said ram, a second trip lever pivoted to said frameand having its one arm engaged with said friction rod, the other armbeing formed with a socket in its inner face, a shaft carried by saidother arm parallel to the pivotal axis of said second lever, a. rollermounted on said shaft and normally disposed within said socket, andmeans for shifting said shaft transversely of said lever arm and movingsaid roller into the ascending path of said ram. Y

6. In a board hammer, a roll and a'board, a friction rod for moving saidroll into contact with said board, a ram mounted to reciprocate in theframe of said hammer, a trip lever pivoted to said frame and having onearm engaged with said friction rod and its other arm disposed in theascending path of said ram, a. second trip lever pivoted to said frameand having its one arm engaged with said riction rod, the other armbeing formed with a socket in its inner face, a shaft carried by saidother arm parallel to the pivotal axis of said second lever, a rollermounted on said shaft, a compression spring sleeved on said shaft andtending normally to hold said roller in said socket, and means adaptedto overcome the force of said spring and to shift said shafttransversely of said lever arm and said roller into the ascending pathof said ram.

ln aboard hammer, a roll and a board, a friction rod for moving saidroll into contact with said board, a ram mounted to recipro- Cate in theframe of said hammer, a trip lever pivoted to said frame and having onearm engaged with said friction rod and its other arm disposed in theascending path of said ram, a second trip lever pivoted to said frameand having its one arm engaged with said friction rod, the other armbeing formed with a socket in its inner face, a shaft carried by saidother arm parallel to the pivotal avis of said second lever, a rollermounted on said shaft, a compression spring sleeved on said shaft andtending normally to hold said roller in said socket, and a solenoid coilsurrounding said shaft and guided to oscillate with said lever arm butagainst movement in a line parallel with the pivotal axis of said lever,said solenoid coil, when energized, being adapted to overcome the forceof said spring and to shiftl said shaft transversely of said lever armand said roller into the ascending path of said ram.

8. ln a board hammer, a ram slidable in a frame, and means for liftingsaid ram including a board secured to said ram, a pair of rolls disposedon each side of said board, a motor, a drive shaft journalled in saidframe in line with the spindle of said motor, a flerible couplingconnecting said drive shaft to said motor spindle, a pinion on saiddrive shaft, an intermediate shaft journalled in said frame, a gear onsaid intermediate shaft n'ieshing with said pinion, a second gear onsaid intermediate shaft, a second intermediate shaft journalled in saidframe in the same horizontal plane with said first intermediate shaft,gear on said second intermediate shaft having a pitch diameter equal tothat of said second gear on said first intermediate shaft and meshingtherewith, a shaft on each of said rolls, a gear on each of said rollshafts, and a pinion on each of said intermediate shafts, each pair ofsaid roll shaft gears meshing with one of said intermediate shaftpinions.

9. In a board hammer, a ram slidable in a frame, and means for liftingsaid ram including a board secured to said ram, a pair of rolls disposedon the front side of said board, a pair of rolls disposed on the bachside of said board, a motor, a drive shaft ournalled in said frame inline with the spindle of said motor, flexible coupling connecting saiddrive shaft to said motor spindle, a flywheel on said drive shaft, apinion on said drive shaft, a back intermediate shaft journalled in saidframe, a gear on said back intermediate shaft meshing with said pinion,an infermediate gear on said back intermediate shaft, a frontintermediate shaft journalled in said frame, an intermediate gear onsaid front intermediate shaft h avin a pitch diameter equal to that ofsaid back intermediate gear and meshing therewith, a shaft on each ofsaid rolls, gear on each of said roll shafts, a ninion on said backintermediate shaft meshing With both of said back roll gears,

and a pinion on said front intermediate shaft meshing with both of saidfront roll gears.

10. In a board drop hammer, the combination of two pairs of liftingrolls, one pair of said rolls being journalled one above the other ineccentric housings, an arm projecting from the upper of said housingsadjacent one end thereof, an arm projecting from the lower of saidhousings adjacent the corresponding end thereof, a second arm projectingfrom said lower housing adjacent the opposite end thereof, an adjusting`rod, a lever pivoted substantially at its mid-point to said adjustingrod, a link connecting one end of said lever to the arm of said upperhousing, a link connecting the other end of said lever to said secondarm of said lower housing, said lever and links permitting relativemovement of said housings with respect to each other and resilient meansconnected to said first arm of said lower housing, and cooperating withsaid first-mentioned link tending to prevent such relative movement.

ll. In a board drop hammer, the combination of two pairs of liftingrolls, one pair of said rolls being j ournalled one above the other ineccentric housings, an arm projecting from the upper of said housinosadjacent one end thereof, an arm projecting from the lower of saidhousings adjacent the corresponding end thereof, a second arm projectingfrom said lower housing adjacent the opposite end thereof, an adjustingrod, a lever pivoted substantially at its mid-point to said adjustingrod, a link connecting one end of j said lever to the arm of said upperhousing,

a link connecting the other end of said lever to said second arms ofsaid lower housing, said lever and links permitting relative movement ofsaid housings with respect to each other, a sleeve pivoted to said rstarm of said lower housing, said first-mentioned link being slidablyreceived in said sleeve, and a compression spring cooperating with saidsleeve and with said link and tending to prevent such relative movement.

l2. In a board drop hammer, the combination of two pairs of liftingrolls, one pair of said rolls being j ournalled one above the other ineccentric housings, an arm projecting from the upper of said housingsadjacent one end thereof, an arm projecting from; the lower of saidhousings adjacent the corresponding end thereof, a second arm projectingfrom said lower housing adjacent the opposite end thereof, an adjustingrod, a lever pivoted substantiaily at its mid-point to said adjustingrod, a link connecting one end of said lever to the arm of said upperhousing, a link connecting the other end of said lever to said secondarm of said lower housing, said lever and links permitting relativemovement of said housings with respect to each other, a sleeve pivotedto said first arm of said lower housing, said first-mentioned link beingslidably received in said sleeve, an upwardlyfacing internal shoulderformed in said sleeve, an upwardly facing external shoulder formedonsaid link and adapted to register with said sleeve shoulder, a followersleeved on said link within said sleeve andV adapted normally to `besupported on both said shoulders, and a compression spring sleeved onsaid link within said sleeve and having its one end abutting againstsaid follower, whereby said spring tends to maintain said shoulders inregistry.

13. In a board drop hammer, the combination of two pairs of liftingrolls, one pair of said rolls being journalled one above the other ineccentric housings, an arm projecting from the upper of said housingsadjacent one end thereof, an arm projecting from the lower of saidhousings adjacent the corresponding end thereof, a second arm projectingfrom said lower housing adjacent the opposite end thereof, an adjustingrod, a lever pivoted substantially at its mid-point to said adjustingrod, a link connecting one end of said lever to the arm of said upperhousing, a link connecting the other end of said lever to said secondarm of said lower housing, said lever and links permitting relativemovement of said housings with respect to each other, a sleeve pivotedto said first arm of said lower housing, said first-mentioned link beingslidably received in said sleeve, an upwardly-facing internal shoulderformed in said sleeve, an upwardly-facing external shoulder formed onsaid link and adapted to register with said sleeve shoulder, a followersleeved on said link within said sleeve and adapted normally to besupported on both said shoulders, a downwardly-facing internal shoulderformed in said sleeve, a downwardly-facing external shoulder on saidlink and adapted to register with said sleeve shoulder, a followersleeved on said link within said sleeve and adapted normally to abutagainst both said downwardly-facing shoulders, and a compression springsleeved on said link within said sleeve and bearing at its one endagainst one of said followers and at its other end against the other ofsaid followers, whereby said spring tends to maintain -said respectivelink shoulders in registry with said respective sleeve shoulders.

14:. In a board drop hammer, the combination of two pairs of liftingrolls, one pair of said rolls being journalled one above the other ineccentric housings, an arm projecting from the upper of said housingsadjacent one end thereof, an arm projecting from the lower of saidhousings adjacent the corresponding end thereof, a second arm projectingfrom said lower housing adjacent the opposite end thereof, an adjustingrod, a lever pivoted substantially at its mid-point to said adjustingrod, a link connecting one end of said lever to the arm of said upperhousing,

e. link connecting the other end of seid lever to said second arm ofsaid lower housing, said lever und links permittingy relative movementof said housings With respect to each other, and resilient meansconnected to said first erm of Seid lower housing, and cooperating withseid first-mentioned link tending to prevent such relative movement.

Signed by me, this 6th day of July, 1928. VILLAM lV. CRILEY.

